287738940 has 48 divisors (see below), whose sum is σ = 853064352. Its totient is φ = 72216576.

The previous prime is 287738939. The next prime is 287738951. The reversal of 287738940 is 49837782.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 287738940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140029 + ... + 142068.

It is an arithmetic number, because the mean of its divisors is an integer number (17772174).

Almost surely, 2^287738940 is an apocalyptic number.

287738940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287738940 is an abundant number, since it is smaller than the sum of its proper divisors (565325412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

287738940 is a wasteful number, since it uses less digits than its factorization.

287738940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282126 (or 282124 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 287738940 is about 16962.8694506560. The cubic root of 287738940 is about 660.1858521597.

The spelling of 287738940 in words is "two hundred eighty-seven million, seven hundred thirty-eight thousand, nine hundred forty".